Apparatus for truing up castings of varying contour



June 5, 1928.

A E. J. STANEK APPARATUS FOR TRUING UP CASTINGS OF VARYING CONTOUR Filed Jan. 4, 1925 5 Sheets-Sheet mm b INVENTOR. W g1 22 4 A TTORNE Y.

June 5, 1928.-

E. J. STANEK APPARATUS FOR TRUING UP CASTINGS OF VARYING CONTOUR Fild Jan. 4, 1926 5 Sheets-Sheet INVENTOR A gum GE wk ATTORNEY.

June 5, 1928.

E. J. STANEK I APPARATUS FOR TRUING UP CASTINGS 'OF VARYING CONTOUR '5 Sheets-Sheet 4 Filed Jan. 1, 1926 w "H n 1N VEN TOR.

O A TTORNEY.

E. J. STANEK June 5, 1928.

APPARATUS FOR TRUING UP CASTINGS OF VARYING CONTOUR 5 Sheets-Sheet 5 Filed Jan. 1926 LEfj/ZZ/ II II INVENTOR.

- wag Li ATTORNEY.

' straightening and truing up castings ofvary-l their dimensions Within'the close tolerances I and due to the fact that during the casting Patented June .5, 1928.

UNITED STA EDWARD J} s'rANE or ILWAUKEE, Wisconsin APPARATUS non TRUING UP cAsrrNes or vAnYmecoN'roURf Application filed January .The invention relates to devices" for ing contour, and more particularly malleable iron castings, suchas are used as the differential carrier member. onautomotive vehicles.

Castings as they come I from the molds. L

often vary to a considerable .extentfromthe true dimensions because of the shifting of the cores or the failureto center tlIBHYPIOP- erly.

such as'malleable iron castings, are'annealed,

they sometimes become distorted. In either j event such'castnigs cannot be readily chucked for machining to-their finished dimensions, and, also, in adififerential carrierthewalls adjacent the ring gear have to insure the proper clearance for such gearl ,The' object of this invention is to-provide an apparatus for straightening or truing'up'castings, such as malleable iron differential carriercastings, whereby such castings may beheld within the tolerances Specified by the manue facturer who finishes the castings, and so-far I as I 'amaware, until thep'resent invention was devised no satisfactory apparatus existed fortruing up diiferential carriers to bring now demanded'by 'the'manufacturer;

The invention further consists in the several features hereinafter set forth and more particularly" defined by claims at'the conclu sionhereofl I In the drawings, Fig. 1 is a verticalsectionalview throughan apparatus embodying the invention, with the casting being treated shown therein;

Fig. 2 is a view, partly iii-section, ofthe apparatus, the section being taken at right anglesrto that of Fig. 1'; v v

' detail sectional view taken. on

Fig. 3'is a I the line 3-3 of Fig.'1', parts being broken. away; I

l ig. 4 is a sectional view taken on the line HofFiglz' I Fig. 5 is a detail sectional viewtaken on the line 5-5 of Fig.1, the casting being omitted;

Fig. 6 is a vertical'sectional view of' a differential carrier taken on the line 6 6 ofFig.8; 1 Fig. 7' 's a similar sectional view theline 7 7 ofFig.8; V I

Fig. 8 isaplan view ofthe difit'erential' carrier shown in Figs. 1, 2, 6 and 7;

taken on Fig.) is a vertical sectional view of an Furthermore, where these castings,

thereto by means of 4, 19 26. Serial M79377...

certain additional featuresover that shown in Fig. 1, and with a differential carrier having certain modifications Fig. 10 is a view simi takenat right angles thereto;

Fig. 11 is'a plan view ofthe differential carrier shown in Figs. 9 and 10; .7 1 .Fig'. 12 is a sectional view taken on the line IQ- 120f Fig. 11;

Fig. 13 isa section taken on theline 13- 43 i of'Fig. 1 1.

i Figs. 6 to 8, carrier C, of known" form, wherein the nu- 'meral 14 designates the tubular end portion lar to 9 and,

inclusive, show a differential designed to receive the propeller shaft'ofan automotive vehicle, 15' the flanged, end designed. for connection with. the differential housing, 16 ther-ing gear cavity, and '17 the forming the ring gear cavity. 16 must" have enough clearance to accommodate the ring gear that rotates therein.,- .Carriers'of this bearing lugs for the rear axle shafts of the 5 vehicle; In carriers of this form or'ge'neral I type the tubular. end 14. is subjected to certain machining operations andthe inner wall kind are'generally made of jmalleable iron castings which areannealed after casting,"

process and-the subsequentfannealing process certain inaccuracies frequently occur.

Such I castings have to be trued up so thatthe sub-. i

apparatus shownin Figs. 1 to 5, inclusive, is

used, for this purpose.

I This apparatus includcsfarelativelyifixed- I die member 18having another dissection 19 associated therewith and adjustable relative shims 20 and a die. member 21 cooperating with the members 18 and 19 and. associated with a ringsectionz-22, the

members 321 and QQ-being; held together and toe head member 23by a centrally disposed bolt 24', saidjhead member adapt-edto be en gaged bythe pressing plunger or. platen of any suitable I up operation. The members 21 and 22 may be spaced at diiferent'distances from the headmember-23 by. means of shims 25and 25 of the desired ;tl1ickness.-

.With this construction oppositely disposed sides 26 of the member 18 and similar sides 27 of: the die-section 19' are curvedtotake the outer cnrved'side' 28 of the casting, 'and the die member 21 is similarly curvedto em press to accomplish the truing therefrom to engage in the semicylindrical bearing recesses 33 in the lugs Not the cast- (Eli - portion of the member 18. Associated with the member 34 are a plurality of straightening "die sections 38, a

gage the inner side 29 of the wall forming In addition to truing up the inner wall of the cavity 16 and the flange 30, seniicylindrical die blocks 32 are secured between the die memberQl and the head member 23 at their inner ends and pro ect outwardly ings to true these recesses up during the pressing operation above referred to. Thus portions at one-end of the carrier are pressed into'the desired true shape, and means are also provided for sinniltaneously truing up I the tubular end 14 of the casting.

-This last-named means includes a casing and'die guide member 3a WlllCh-lSHlOLHltBCl in an annular recess 35 in the lower-end of the member 18 and may be adj ustablyspaced therefrom at its upper end by a ring or washer 36, to accommodate castings 0f dif- "ferent lengths, and at its lower end rests upon another ring member or) which in turn engages a base plate 37' seated in the base stripper-plate 39, springs 40 associated with said plate, and spring-s41 associated with said dies 38.

The casing or die guide member 34 has a wedge-shaped surface or surfaces, and in'the caseof a tubular casting, as here shown, the surface 42 is of conical form extending to a cylindrical surface 41-3 in which the stripperplate 39 is disposed. The straightening dies 38 are of con'iplementary form to form a contractible die, each having a Wedge-shaped outer surface 414, and are .in the form of segments of a conical surface to cooperate with the conical surface 42, and are normally separated by the springs 41 seating in bores 4-5 in the adjacmit dies. of each of the dies 38 is shaped to conform to the trued up shape of the article to be straightened, and in the present instance these'walls form segments of a cylindrical surface to receive the tubular end ofthe casting, Adjacent the wall 46 each die section 38 hasan inwardly extending stop por:

tion 4-7, heresh'o'wn as a flange, the flanges of ad1acent sections being designed to form an inwardly extending ledge against'which the end 48 0f the tubular portion 1 of the casting abuts; The die sections adjacent used in connection with this carrier. The inner wall 46 be relieved above this part by tapering wa insertion of the tubular end of the casting 'w tlnn the cavity formed by the dies.

Ring niembers 36 of varying thickness may be interposed between the member 34 and the base plate 37 so that said member 34 in which the dies 38 are mounted maybe raised or lowered to adjust the dies for different lengths of travel relative to the memher 34 and hence accommodate castings of e var rng external diameters.

With this construction, before and during the time the upper part of the casting is be ing pressed to the desired true form, the press, through engagement with the head member 23 and the die me1nber18, causes the tubular end 14 of the casting to move downwardly into the cylindrical cavity formed by the dies 38. During this downward movement the end 48 of said casting engage; the stop portions 470f. the dies 38 and hence during this movement these dies are moved. Withthe casting relative to the guide member 3 1 which by reason of they tapered contact between said member 3 1 and I saiddies 38 causes saiddies to be moved inwardlyand contract. about the lower end, a

and the time the upper parts of the cast 1 ing. havebeen straightened and have reached a stop position the dies 38 have pressedior squeezed the outer surface of the tubular end l t of th-e casting of the desired size and hence this end has been trued up so that it may be readily chucked for subsequent machining operations. Thereafter the i release of pressure" upon the upperpa'rti of the casting allows the springs 10 to acton the plate 39'and push the dies 38 upwardly and loosenthem from wedging engagement with the member-34, and as soon as said vsections are free they are pushed apart bythe springs, 41 acting upon them and thus the lower end of the casting is freed from the die and as the upper movable dies have been moved up- I wardly by the press the casting may beremoved 'froin the apparatus. i

3 In the differential carrier shown in Figs.

11 to 13, inclusive, there are certain modiiicwf tions over that previously described and there are ccrtain'additions for the apparatus I ,As shown, this carrier has a short tubular end portion 50 designed to receive-the propeller shaft, a' laterally extending shaft-bearing portion 51, a ring gear cavity 52, the attaching flange 53 and the rear axle shaft-bearing lugs 54.. I a The lower tubular end50 isstraightened by the dies 38, similar to the dies 38 and having stop flanges 17. similarly associated with said end and similarly associated with the conical die guide member 55,, the baseplate 56, springs 57, stripper-plate 58,

springs -59, spacing rings-0 and 61,;these wall of the tubular end 50 to the desired external dimensions, it being noted that one of the dies 38 has a recess 62 formed therein to accommodate'the lugs (33 on said carrier.

struction to laterally brought to these limits so that The inner curved wall of the cavity 52 and the flange 53 are true'd up by parts 18, 19', 20, 21, 22, 23 and 24:, similar to the parts 18 to 24,,inclusive, previously described, and extending semicylindrical blocks 64, generally similar to the blocks 32 engage vthe recesses 65 in the lugs 54. g In addition,

flat-faced blocks 66 suitably secured to the ring sectionv22' engage the outer side 67 of the lugs a to true these sides up. These parts act upon the casting similarly to corresponding parts or the first-described contrue up the cavity 52, the flange 53 and the lugs 54, as the lower tubular end is pressed to the desired size and form.

In addition, the upper composite movable die is provided with a disk 68 engageable with the ap'ertured boss 69 of the portion 51 during the downward movement of said upper die and cooperates with a cylindrical anvil 'die 70 secured to the base plate 56 to straighten this portion 51 as the other parts of said casting are trued up.

Thus, by a simple the parts of the carrier whose dimensions must be kept within certain limits are subsequent machining and assembling operations may be readily accomplished.

I desire it to be understood that this invention is not to be limited to any particular form or arrangement of parts except in so far as such limitations are specified in the claims or necessitated by the prior art.

What I claim as my invention is: p

1. In an apparatus for truing up -difl'erential carrier castings, each having a ring gear cavity portion and a tubular end portion, the combination with cooperative relatively movable dies for truing up the ring gear cavity portionof said casting, of means for simultaneously truing up. the tubular end portion of said castlng including a plurality 0t dies engage-able with said end portion and movable therewith during the straightening operation.

cavity portion,

pressing operation all 2. In an apparatus for truing up diflerential carrier castin s, each having a rlng gear cavity portion, a ange, bearmgrecesses and atubular cndportion, the combination with cooperative dies for truing upthering gear cavity portion, the flange and the bearing recesses of said casting, of means for simultaneously truing up the tubular end portion of said casting.

3. In an apparatus for truing up diflerential carrier castings, eachhaving a ring, gear a flange, bearing lugs, hearing recesses and a tubular end portion, the combination with cooperative dies for truing up the ring gear cavity portion,- the flange, and the bearinglugs and the bearing recesses of said casting, of means for simultaneously truing up the tubularend portion of saidcasting.

4. In an apparatus for truing up difierential carrier castings, each having a differential housing end and a tubular end, the combination with relatively movable cooperative dies acting upon the differential housing end of said carrier to straighten said end, of a plurality of straightening dies acting'upon the tubular end of the carrier and actuated by the movement of said carrier on its move- I ment by the movable die of the cooperative dies. 7 i

5. In an apparatus for truingup differential carrier castings, each having a laterally extending shaft-bearing portion, a ring gear cavity, a flange, bearing lugs and a tubular end portion, the combination of cooperative dies for truing up the ring gear cavity, the

flange, the bearing lugs and said shaft-bearcasting, and contractible ing portion of said dies for truing up the tubular end portion of said carrier simultaneously with the truing up operation of said cooperative dies.

6. In an apparatus for truing up differential carriercastings,each having a laterally extending shaft-bearing portion, a ring gear cavity, a flange, bearing lugs and a tubular end portion,'the combination of cooperative dies for'truing up the ring gear cavity, shaft-bearing portion of said castings, and means for simultaneously truin'g'up the tubular end portion of said-casting.

In testimony whereof, I affix my signature.

EDWARD J. VSTANEK.

the flange, the bearing lugs and the 

